Fix search index and ABS monthly

[sjtrny]

Summary

Search index was not being updated when calling update.py and ABS monthly data was being treated as quarterly.

Related Issues

List any related issues here. Write NA if no related issues.

Checklist

• [X] The change is tested and works locally.
• [X] All related issues are referenced.
• [X] Blog post included in PR if required e.g. new feature.